Python/C2/Plotting-the-data/English-timed - Revision history

PoojaMoolya at 05:18, 27 March 2017

2017-03-27T05:18:53Z

PoojaMoolya at 12:23, 20 February 2017

2017-02-20T12:23:23Z

Gaurav at 07:06, 10 July 2014

2014-07-10T07:06:21Z

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Sneha at 06:18, 11 March 2013

2013-03-11T06:18:35Z

Minal: Created page with '{| border=1 !Visual Cue !Narration |- | 0:01 | Hello Friends and Welcome to this tutorial on "Plotting Experimental data". |- | 0:05 | At the end of this tutorial, you will be a…'

2013-01-02T10:52:51Z

Created page with '{| border=1 !Visual Cue !Narration |- | 0:01 | Hello Friends and Welcome to this tutorial on "Plotting Experimental data". |- | 0:05 | At the end of this tutorial, you will be a…'

New page

{| border=1
!Visual Cue
!Narration
|-
| 0:01
| Hello Friends and Welcome to this tutorial on "Plotting Experimental data".

|-
| 0:05
| At the end of this tutorial, you will be able to,

# Define a list of numbers.
# perform element wise squaring of the list.
# Plot data points.
# plot errorbars.

|-
| 0:18
| One needs to be familiar with the concepts of plotting mathematical functions in Python.

|-
| 0:23
|We will use data from a Simple Pendulum Experiment to illustrate.

|-
| 0:30
| As we know for a simple pendulum, length L is directly proportional to the square of time T.

|-
| 0:37
| We shall be plotting L and T square values.

|-
| 0:40
|First we will have to initiate L and T values.

|-
| 0:44
|We initiate them as sequence of values.

|-
| 0:47
| We define a sequence by comma separated values inside two square brackets.

|-
| 0:52
| This is also called a List.

|-
| 0:54
| Let's create two sequences L and t.

|-
|0:58
|L = [0.1, 0.2, 0.3, 0.4, 0.5,0.6, 0.7, 0.8, 0.9]

|-
|1:10
|T= [0.69, 0.90, 1.19,1.30, 1.47, 1.58, 1.77, 1.83, 1.94]

|-
| 1:29
| To obtain the square of sequence T we will use the function square with argument T.

|-
| 1:36
|This is saved into the variable Tsquare.

|-
|1:38
|So type Tsquare=square withinbracket T

|-
|1:55
|Tsqaure enter

|-
| 2:00
| Now to plot L versus T square, we will simply type

|-
|2:07
|plot within bracket L comma Tsquare comma dot in single quote

|-
| 2:21
| dot here displays the plot in a dot pattern.

|-
| 2:26
|You can also specify 'o' for big dots.

|-
| 2:31
| For this let us clear the plot first.

|-
|2:34
|Type clf bracket enter

|-
|2:39
|Type plot within bracket L comma Tsquare comma o in single quote enter
to clear the bracket type clf bracket

|-
| 3:01
| Let us move further.

|-
| 3.03
| For any experimental there is always an error in measurements due to instrumental and human constraints.

|-
| 3:10
| Now we shall try and take these errors into account in our plots .

|-
| 3:17
| Pause the video here, try out the following exercise and resume the video.

|-
| 3:21
|Plot the given experimental data with large dots.

|-
| 3:25
| The data is on your screen.

|-
|3:29
| Its given in delta underscore L and delta underscore T

|-
| 3:37
| We shall again initialize the sequence values in the same manner as we did for L and T.

|-
| 3:48
| Now to plot L vs T square with an error bar we use the function <tt>errorbar()</tt>.

|-
|4:00
|Before plotting the data we need to get the data of delta underscore L and delta underscore T

|-
|4:05
|delta underscore L= within square bracket 0.08,0.09,0.07,0.05,0.06,0.00,0.06,0.06,0.01

|-
|4:25
|delta underscore T= [0.04,0.08,0.03,0.05,0.03,0.03,0.04,0.07,0.08]

|-
|4:40
|Now use the error function

|-
|4:44
|Type errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=bo in single quote

|-
| 5:32
| This gives a plot with error bar for x and y axis.

|-
| 5:36
| The dots are of blue color.

|-
| 5:38
| The parameters xerr and yerr are error on x and y axis and fmt is the format of the plot.

|-
| 5:46
|similarly we can draw the same error bar with small red dots just change the parameters of fmt to with in single quote r dot.

|-
|5:59
|Type clf()
errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=within r.

|-
| 6:24
| you can explore other options to errorbar using the documentation of errorbar.

|-
|6:30
|errorbar? on terminal
|-
| 6:38
| Pause the video here, try out the following exercise and resume the video.

|-
| 6:44
|Plot the given experimental data with small dots and also include the error in your plot.

|-
| 6:51
| The data is on your screen delta s delta n

|-
| 7:00
| This brings us to the end of the end of this tutorial.

|-
| 7:03
| In this tutorial, we have learnt to,
1. to declare a sequence of numbers using the function <tt>array</tt>.

|-
| 7:09
| 2. to perform elementwise squaring using the <tt>square</tt> function.

|-
| 7:14
| 3. to use the various options available for plotting like dots,lines.

|-
| 7:20
| 4. to Plot experimental data such that we can also represent error by using the <tt>errorbar()</tt> function.

|-
| 7:28
| Here are some self assessment questions for you to solve

|-
| 7:32
| 1. Square the following sequence.<br/> <nowiki>distance underscore values=wthin square bracket 2.1 comma 4.6 comma 8.72 comma 9.03 </nowiki>

|-
| 7:44
| 2. Plot L versus T in red pluses.

|-
| 7:52
| And the answers,

|-
| 7:55
|1. To square a sequence of values, we use the function <tt>square</tt>

|-
| 8:02
| Type square within bracket distance underscore values

|-
| 8:09
|2. We pass an additional argument stating the desired parameter

|-
| 8:14
| Type plot within bracket L comma T comma within single quote r+

|-
| 8:24
| Hope you have enjoyed this tutorial and found it useful.

|-
|8:27
|Thank You!

@@ Line 9: / Line 9: @@
 | 00:05
 | At the end of this tutorial, you will be able to,
 Define a list of numbers.
-# Define a list of numbers.
+perform element wise squaring of the list.
-# perform element wise squaring of the list.
+Plot data points.
-# Plot data points.
+plot errorbars.
-# plot errorbars.
 |-
@@ Line 176: / Line 175: @@
 |-
 |05:59
-|Type clf() to clear the plot
+|Type clf() to clear the plot errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=in single quote  r and hit enter.
 errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=in single quote  r and hit enter.
 |-
@@ Line 205: / Line 203: @@
 |-
 | 07:03
-| In this tutorial, we have learnt to,
+| In this tutorial, we have learnt to, to declare a sequence of numbers using the function array.
-. to declare a sequence of numbers using the function array.
 |-
 | 07:09
-| 2. to perform elementwise squaring using the square function.
+| to perform elementwise squaring using the square function.
 |-
 | 07:14
-| 3. to use the various options available for plotting like dots,lines.
+| to use the various options available for plotting like dots,lines.
 |-
 | 07:20
-| 4. to Plot experimental data such that we can also represent error by using the errorbar() function.
+| to Plot experimental data such that we can also represent error by using the errorbar() function.
 |-
@@ Line 226: / Line 223: @@
 |-
 | 07:32
-| 1. Square the following sequence.br distance underscore values=within square bracket 2.1 comma 4.6 comma 8.72 comma 9.03
+|Square the following sequence.br distance underscore values=within square bracket 2.1 comma 4.6 comma 8.72 comma 9.03
 |-
 | 07:44
-| 2. Plot L versus T in red pluses.
+| Plot L versus T in red pluses.
 |-
@@ Line 238: / Line 235: @@
 |-
 | 07:55
-|1. To square a sequence of values, we use the function square
+| To square a sequence of values, we use the function square
 |-
@@ Line 246: / Line 243: @@
 |-
 | 08:09
-|2. We pass an additional argument stating the desired parameter
+| We pass an additional argument stating the desired parameter
 |-

@@ Line 106: / Line 106: @@
 |-
-| 03.03
+| 03:03
 | For any experimental there is always an error in measurements due to instrumental and human constraints.

@@ Line 81: / Line 81: @@
 |-
 |2:07
-|plot within bracket L comma Tsquare comma dot in single quote
+|plot within bracket L comma Tsquare comma within single quote dot
-−
 |-
 | 2:21
-| dot here displays the plot in a dot pattern.
+|Here single quote  dot displays the plot in a dot pattern.
 |-
@@ Line 93: / Line 92: @@
 |-
 | 2:31
-| For this let us clear the plot first.
+| For this let us clear the first plot .
 |-
 |2:34
-|Type clf bracket enter
+|Type clf closing  bracket and hit enter
 |-
 |2:39
-|Type plot within bracket L comma Tsquare comma o in single quote enter
+|Then Type plot within bracket L comma Tsquare comma within single quote o hit  enter now  to clear the bracket type clf closing bracket
   to clear the bracket type clf bracket
 |-
@@ Line 130: / Line 128: @@
 |-
 |3:29
-| Its given in delta underscore L and delta underscore T
+| Its given in delta underscore  delta L and delta underscore T
 |-
@@ Line 138: / Line 136: @@
 |-
 |  3:48
-| Now to plot L vs T square with an error bar we use the function <tt>errorbar()</tt>.
+| Now to plot L vs T square with an error bar we use the function errorbar() .
 |-
 |4:00
-|Before plotting the data we need to get the data of delta underscore L and delta underscore T
+|Before plotting the data we need to get the data of delta L and delta  T
 |-
 |4:05
-|delta underscore L= within square bracket 0.08,0.09,0.07,0.05,0.06,0.00,0.06,0.06,0.01
+|delta  L= within square bracket 0.08,0.09,0.07,0.05,0.06,0.00,0.06,0.06,0.01
 |-
 |4:25
-|delta underscore T= [0.04,0.08,0.03,0.05,0.03,0.03,0.04,0.07,0.08]
+|delta  T= [0.04,0.08,0.03,0.05,0.03,0.03,0.04,0.07,0.08]
 |-
@@ Line 158: / Line 156: @@
 |-
 |4:44
-|Type errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=bo in single quote
+|Type errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt= in single quote bo
 |-
 |  5:32
-| This gives a plot with error bar for x and y axis.
+| This gives a plot with error bar of x and y axis.
 |-
@@ Line 174: / Line 172: @@
 |-
 | 5:46
-|similarly we can draw the same error bar with small red dots just change the parameters of fmt to with in single quote r dot.
+|similarly we can draw the same error bar with small red dots just change the parameters of fmt to r dot.
 |-
 |5:59
-|Type clf()
+|Type clf() to clear the plot
-errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=within r.
+errorbar within bracket L comma Tsquare comma xerr=delta underscore L comma yerr=delta underscore T comma fmt=in single quote  r and hit enter.
 |-
@@ Line 198: / Line 196: @@
 |-
 | 6:51
-| The data is on your screen delta s delta n
+| The data is on your screen for  delta s delta n
 |-
@@ Line 207: / Line 205: @@
 | 7:03
 | In this tutorial, we have learnt to,
-. to declare a sequence of numbers using the function <tt>array</tt>.
+. to declare a sequence of numbers using the function array.
 |-
 | 7:09
-| 2. to perform elementwise squaring using the <tt>square</tt> function.
+| 2. to perform elementwise squaring using the square function.
 |-
@@ Line 219: / Line 217: @@
 |-
 | 7:20
-| 4. to Plot experimental data such that we can also represent error by using the <tt>errorbar()</tt> function.
+| 4. to Plot experimental data such that we can also represent error by using the errorbar() function.
 |-
@@ Line 227: / Line 225: @@
 |-
 | 7:32
-| 1. Square the following sequence.<br/> <nowiki>distance underscore values=wthin square bracket 2.1 comma 4.6 comma 8.72 comma 9.03 </nowiki>
+| 1. Square the following sequence.br distance underscore values=within square bracket 2.1 comma 4.6 comma 8.72 comma 9.03
 |-
@@ Line 239: / Line 237: @@
 |-
 | 7:55
-|1. To square a sequence of values, we use the function <tt>square</tt>
+|1. To square a sequence of values, we use the function square
 |-
 | 8:02
-| Type square within bracket distance underscore values
+|So that we have to Type square within bracket distance underscore values
 |-